Correct option is A
Given:
Petal, Sepal, Pollen, Ligament
Solution:
Petal: Part of a flower
Sepal: Part of a flower
Pollen: Produced by flowers for reproduction
Ligament: Connective tissue in animals/humans
The odd one out is Ligament, as it is not related to flowers, while the others are parts or products of flowers.
Thus, correct answer is (a) Ligament